Cylinder Head Distortion
WARNING: This page is about a different car, the 2006 Ford Pickup, 2006 Ford F550 Super Duty, 2006 Ford F450 Super Duty, and 2006 Ford Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.
SPECIAL TOOLS REFERENCE
| Feeler Gauge Set 303-D027 (D81L-4201-A) or equivalent |
MATERIAL SPECIFICATIONS
| Item | Specification |
|---|---|
| Silicone Gasket Remover ZC-30 | - |
| Motorcraft Metal Surface Prep ZC-31 | - |
- Following the directions on the packaging, use silicone gasket remover and metal surface prep to clean the cylinder head of all gasket foreign material, RTV, oil and coolant.
- Measure cylinder head flatness to make sure that there are no depressions of 0.0508 mm (0.002 in) or greater in the cylinder head.
- Place a 0.0508 mm (0.002 in) feeler gauge on one of the measuring points.
- Place the straight edge on top of the feeler gauge with the straight edge transverse to the cylinder head, as shown.
- Gently pull on the feeler gauge.
- If the feeler gauge is loose or slides out from under the straight edge, install a new cylinder head.
- Repeat the cylinder head flatness measurement at each of measurement points shown in the previous illustration.
CAUTION:
Do not use metal scrapers, wire brushes, power abrasive discs or other abrasive means to clean the sealing surfaces. These tools cause scratches and gouges that make leak paths. Use a plastic scraping tool to remove all traces of the head gasket and other foreign material.
NOTE:
Use a straight edge that is calibrated by the manufacturer to be flat within 0.005 mm (0.0002 in) per running foot of length, such as Snap-On® GA438A or equivalent. For example, if the straight edge is 61 cm (24 in) long, the machined edge must be flat within 0.010 mm (0.0004 in) from end to end.
NOTE:
Measure locations 2 and 3 first. These 2 locations are most susceptible to wear or damage.